diff --git a/goodtimes/webhook.py b/goodtimes/webhook.py
index fb86769..f5f8885 100644
--- a/goodtimes/webhook.py
+++ b/goodtimes/webhook.py
@@ -186,9 +186,9 @@ class PaymentProcessingService:
         self.notification_service = NotificationService()
 
         # Retrieve objects
-        self.principal = self.webhook_service.get_principal_id()
-        self.transaction = self.webhook_service.get_transaction_id()
-        self.subscription = self.webhook_service.get_subscription_id()
+        self.principal = self.webhook_service.get_principal()
+        self.transaction = self.webhook_service.get_transaction()
+        self.subscription = self.webhook_service.get_subscription()
         self.order_id = self.webhook_service.get_order_id()
         self.principal_subscription = None